Tack-pulling machine.



J. B. HADAWAY.

TAGK PULLING MAGHINE.

APPLICATION FILED-TAN. 10, 1908.

1,030,777. Patented June 25, 1912.

2 BHEET$-SHEET 1.

COLUMBIA PLANOGRAPN 60-.WA8HINGTON, D. c

J. B. HADAWAY.

TACK PULLING MACHINE.

APPLICATION FILED J'AN.10, 190s.

Patented Julie 25, 1912.

2 BHEETSSHEET 2.

H N N Z COLUMBIA PLANDGRAPH 0., WASHINGTON. D. C-

srarus .ra'rnnr i rrcn.

JOHN B. HADAWAY, F BROCKTON, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

TACK-PULLING MACHINE.

I To all whom it may concern Be it known that I, JOHN B. HADAWAY, citizen of the United States, residing at Brockton, in the county of Plymouth and State of Massachusetts, have invented certain new and useful Improvements in Tack- Pulling Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Tack pulling machines for preparing lasted shoes for the sewing operation have heretofore been devised by which lasting tacks, driven into the last to hold the upper in a tightly drawn position about the last, are removed and a few stay tacks substituted to prevent the upper from being displaced on the last While the sewing progrosses. Also machines have been devised by which a majority of the tacks are removed and the remaining tacks are only partially withdrawn, these partially withdrawn tacks corresponding to the stay tacks which are driven by the first named class of machines. The present invention relates to machines of the latter class.

In machines heretofore devised of the class to which the present invention relates, two tack pulling devices are provided for engaging the head of a tack, one device to be used when it is desired to entirely withdraw the tacks and. the other device when it is desired to only partially withdraw a tack. The provision of two separate tack pulling devices together with their actuating mechanism necessarily complicates the construction of the machine, and inasmuch as these devices are constantly operating considerable skill and care is required on the part of the operator to manipulate the shoe and feed it through the machine so as to bring each tack into engagement with the desired tool and at the same time prevent either tack pulling tool from injuring the shoe upper. Also in this machine the device which partially withdraws the tacks does so by engaging the heads of the tacks. The distance to which the lasting tacks are driven into the last varies considerably and in the operation of the device which partially withdraws the tacks there is the liability that those tacks which are driven deeply into the last will be withdrawn andloosened to such an extent that they will Specification of Letters Patent.

Application filed. January 10, 1908.

Patented June 25, 1912.

Serial No. 410,240.

fall from the shoe while those tacks which are only lightly driven into the last will be withdrawn but little, if at all, so that difficulty is had in subsequently removing them either during or after the sewing operation.

An object of the present invention is to provide a tack pulling machine adapted to remove the majority of the lasting tacks and only partially withdraw the remaining tacks which will be more simple in construction and more eiiicient in operation than those that have heretofore been devised and which will have the tack pulling devices so arranged and operated that the shoe can be readily fed through the machine and manipulated to bring the tacks into engagement with the tack pulling device or devices without liability of injury to the shoe upper.

Another object of the present invention is to provide a machine by which tacks driven into the last irregular distances may be withdrawn a predetermined distance, or in other words, so that the shanks of the tacks projecting above the last may be increased a uniform amount.

-VVith these objects in view a feature of the present invention contemplates the provision in a tack pulling machine of a tack pulling device constructed and arranged to engage a lasting tack and means for causing the device to pull the tack entirely from the shoe or to only partially withdraw or release the tack.

Broadly considered the invention con templates the provision of any suitable means for causing a tack pulling device to pull a tack either wholly or only partially from a shoe. In the simplest and most ellicient form of the invention which the applicant has devised, however, this result is secured by varying the tack pulling move ment of the tack pulling device. To enable the operator to partially withdraw only such tacks as he may think necessary or desirable, the means for varying the tack pulling movement of the tack pulling device is preferably so arranged that it is under the control of the operator. A comparatively few holding tacks are required and consequently the mechanism for actuating the tack pulling device is preferably normally arranged to cause the tack pulling deviceto entirely Withdraw a tack and the movement of the tack pulling device is varied by the operator to cause a tack to be only partially withdrawn.

lieved to be new. Accordingly this feature of the invention, except as defined in the claims, is not limited to use in a machine.

in which the same tack pulling device is used both to partially withdraw certain of the tacks and wholly withdraw the remaining tacks. In the machine hereinafter described this feature of the invention is embodied in a tack pulling device which grips the shank of a tack and pulls the tack by means of its shank instead of by engaging its head, but it is to be understood that broadly considered this feature of the invention is not limited to a tack pulling device which engages the tack in this manner.

In addition to the features of invention above referred to, the present invention also consists in certain devices, combinations and arrangement of parts hereinafter described and claimed, the advantages of which will be apparent to those skilled in the art from the following description.

The various features of the' present invention will be clearly understood from an inspection of the accompanying drawings, in which 1 Figure 1 is a view in side elevation of a tack pulling machine embodying the same in their preferred form; Fig. 2 is a view in front elevation; Fig. 3 is a plan view of the tack pulling jaws and reciprocating block; and Fig. 4: is a detail showing one of the tack pulling jaws in plan and side elevation.

The tack pulling device of the machine illustrated in the drawings comprises oppositely disposed cooperating jaws 1 secured by the screws 2 to the arms 3. The engaging ends 4 of the jaws are shaped similar to the cutting edge of a chisel so that the jaws will engage and bite slightly into the shankof a tack, thus preventing the aws from slipping along the shank during the tack pulling movement. The jaws are adjustable upon the arms 3 by means of the adjusting screws 5 and slots 6. The tack pulling jaws are actuatedto alternately engage and release a tack by means of the cams 7 on the shaft 8, connected to suitable power through the pulley 9 and journaled in arms 10 projected upward from the frame 11. Rolls 12 on the,

ends of the arms 3 are engaged by the peripheral grooves 13 on the cams 7 this arrangement duringthe operation of the machine moving the jaws 1 into and out of tack engaging position. jaws 1 also have a reciprocating movement in order that after the tack has been engaged by the jaws it will be pulled. To this end the arms 3 are pivoted to ears 14E by means of the bosses 15. The ears 1 1 project from a block 16 arranged to slide in a suitable guide-way. The block 16 is pivotally connected at 17 to a link 18 connected by means of a pin 19 to a block20 which is mounted so as to be capable of an adjustment in a slideway 21. The slideway 21 is slightly curved and is formed in an oscillating arm 22 pivotally connected to the frame of the machine at 23. The oscillating arm 22 is connected to an eccentric link and strap 24 by means of the pin 25, and is oscillated about the pivot 23 by means of the eccentric 26, each oscillation of the arm 22 producing a reciprocation of the block 16 carrying the tack pulling jaws 1.

An adjustable spring 27 holds the blockcarrying arm 18 in the position shown in Fig. 1. In this position the block 20 is swung through a greater arc of a circle during the oscillations of the arm 22 than at any other position the block 20 can occupy in the slide-way 21. Consequently in this position of the block 20 the reciprocating block 16-will have its greatest travel, and as the jaws 1 are connected to the block 16 they will have their greatest pulling movement pulling the tacks entirely out of the last. During this tack pulling movement of the jaws the rolls 12 on the arms 3 also reciprocate in the grooves 13. To decrease the tack pulling movement of the jaws and cause them to partially withdraw or loosen a The tack pulling tack, a chain 28, connected to a treadle (not shown), is connected to the block 20 so that its position in the oscillating arm 22 may be changed whenever the operator desires to pull the tack only part way out of the last. Directly beneath the block-carrying link 18 is located an adjustable abutment stop 29 to limit the downward movement of the block-carrying link 18. By means of this stop' the operator may positively determine the tack pulling movement of the jaws when operating to partially withdraw or loosen a tack.

As has been stated, the tack engaging ends of the tack pulling jaws are provided with chisel edges, and these edges bite into the shank of the tack and pull the tack by means of its shank, instead of engaging its head, as do the tack pulling devices of priormachines. The tacks which are only partially withdrawn by the action of the tack pulling jaws, are therefore withdrawn a uniform, predetermined distance, and loosened to the same extent irrespective of the distance to which they have been driven into the last. To protect the corners of the chisel edges of the jaws, each jaw is provided at its sides with strengthening ribs as indicated at 30 in Fig. 4, which ribs extend to the extreme ends of the tack engaging edges.

The shoe upper is engaged on opposite sides of a tack, and the shoe is held in po sition while the tack is being pulled, by stat-ionary presser feet or work supports consisting of thin plates 31 secured to arms projecting from the lower end of the guide way for the block 16. The adjacent ends oi the plates 31 extend slightly beyond the arms 32 as best shown in Fig. 3 so that the tack pulling jaws can operate close to the upper surfaces of the plates. The space between the plates forms a guideway by means of which the tacks can readily be guided into proper position to be engaged by the tack pulling jaws.

Having thus described the construction and mode of operation of my invention, I claim as new and desire to secure by Letters Patent of the United States:

1. A tack pulling machine, having, in combination, a tack pulling device, means for imparting to the device a tack pulling movement and means for actuating the device to engage a lasting tack projecting from a lasted shoe, and to release the tack before the tack has been wholly pulled from the shoe and when the projecting part of the tack has been increased a predetermined amount regardless of the length of the tack or the distance to which it has been driven into the last, substantially as described.

2. A tack pulling machine, having, in combination, a tack pulling device provided with tack gripping jaws, means for imparting a tack pulling movement to the device and means for actuating the device to grip the shank of a lasting tack projecting from a lasted shoe, and to release the tack before it is pulled wholly from the shoe and when the projecting part of the tack has been increased a predetermined amount regardless of the length of the tack or the distance to which it has been driven into the blast, substantially as described.

3. A tack pulling machine, having, in combination, a tack pulling device, mechanism for actuating the device to engage a lasting tack projecting from a lasted shoe and pull the tack and means for causing the device to pull the tack either wholly or partially from. the shoe, substantially as described.

4. A tack pulling machine, having, in combination, a tack pulling device, means for actuating the device to engage a tack projecting from a lasted shoe and pull the tack, and means for varying the tack pulling movement of the device, to pull the tack either wholly or partially from the shoe, substantially as described.

5. A tack pulling machine, having, in combination, cooperating tack gripping jaws, means for actuating the jaws to grip the shank of a lasting tack projecting from a lasted shoe and pull the tack, and means .for varying the tack pulling movement of the jaws to pull the tack either wholly or partially from the shoe, substantially as described.

6. A tack pulling machine, having, in combination, oppositely disposed tack gripping jaws, means for actuating the jaws to grip the shank of a lasting tack projecting from a lasted shoe and pull the tack, and means for varying the tack pulling movement of the jaws to pull the tack either wholly or partially from the shoe, substantially as described.

7. A tack pulling machine, having, in combination, tack gripping jaws provided with chisel edges, means for actuating the jaws to grip the shank of a lasting tack projecting from a lasted shoe and means for varying the tack pulling movement of the jaws to pull the tack either wholly or partially from the shoe, substantially as described.

8. A tack pulling machine, having, in-

combination, a tack pulling device, means for actuating the device to engage a lasting tack projecting from a lasted shoe and pull the tack, and treadle actuated mechanism for varying the tack pulling movement of the device to pull the tack either wholly or partially from the shoe, substantially as described.

9. A tack pulling machine, having, in combination, cooperating tack pulling jaws, means for actuating the jaws to engage a lasted tack projecting from a lasted shoe and pull the tack, and treadle actuated mechanism for varying the tack pulling movement of the jaws to pull the tack either wholly or partially from the shoe, substantially as described.

In testimony whereof I aflix my signature, in presence of two witnesses.

JOHN B. I-IADAWAY.

Witnesses:

FRED O. FISH, ANNIE O. RICHARDSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

It is hereby certified that in Letters Patent No. 1,030,77 7 granted June 25, 1912,

upon the application of John B. Hadaway, of Brockton, Massachusetts, for an improvement in Tack-Pulling Machines, an error appears in the printed specification requiring correction as follows: Page 3, line 51, for the Word blast read last, and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Oflice.

Signed and sealed this 28rd day of July, A. D., 1912.

[SEAL] C. BILLINGS,

' Acting Commissioner of Patents. 

